Is it possible to show multiple series within the same QwtPlot widget?

As one example, showing a line chart with a histogram that is at the bottom of the chart, as is typically found in financial charting applications.

You can attach as many QwtPlotItems as you like to a plot. F.e. a curve is a plot item, that represents a series of X/Y points, but there are other types of plot items as well ( and you can implement your own ).

For your application it might be better to use Qwt from SVN trunk, because it is easier to implement plot items for other types of samples ( see QwtPlotSeriesItem ).

Uwe